Improvement in time-locks



2 Sheets- Sheet1,

S. A. LITTLE.

Time-Locks.

Patented Jan. 27,1874.

SAMUEL A. LITTLE, OF BUCKLAND, MASSACHUSETTS.

IMPROVEMENT IN TIME-LOCKS.

Specification forming part of Letters Patent No. 146,832, dated January '27, 1:74; application filed July 5, 1873.

To all whom it may concern:

Be it known that I, SAMUEL A. LITTLE, of Buckland, in the county of Franklin and State of Massachusetts, have made certain new and useful Improvements in Clock-Locks,

whereof the following is a specification, refer-' 1. Fig. 3 shows a cam-wheel, marked B in- Fig. 1. Fig. 4 shows a graduated cam-wheel, marked 0 in Fig. 1. Fig. 5 represents the inside of a safe with the door-bolts locked forward by the lever-dog, which is elevated by the clock-lock. Fig. 6 represents a horizontal section of my clocklock detached from the clocks, the dog'lever excepted, taken through the line as w of Fig. 1. Fig. 7 represents a vertical section of the same, (similarly detached, except that the clock-wheels to which the same is immediately attached are shown,) taken through the line 3/ y of Fig. l.

In the various figures, similar letters indicate similar parts.

D and E are two clock-movements fastened to the inside F of a safe, adjacent to the hinged part of a safe-door, Gr. Said clock-movements, through the wheels and ratchets K and L, (shown by the dotted lines, Fig. 1,) which are rotated once in twelve hours by the clock, propel the wheels H and I in the same timein the direction of the arrows thereon. The wheels H and I are both geared to the common wheel M, having twice as many teeth as either H or I, and propel the same in the direction of the arrow thereon, so that, while H and I are rotated once in twelve hours, M is rotated once a day. It will thereby be seen that both clocks work together in turning the wheel M, and thereby operating the look, while, if either clock stops, the wheel 11 or I of the other will alone continue to rotate the wheel M and operate the lock as the ratchet allows free motion to the wheel I or H of the other clock, although said cloek may be stopped. Forming part of the wheel M is the toothed wheel N,

which is geared into and drives the toothed wheel 0. Forming part of the wheel 0 is the toothed wheel I, which is geared into and drives the seventh-day wheel A. A has twice as many teeth. as P, and O has three and a half times as many teeth as N. Therefore,

while M revolves once in a day, it propels A to revolve once in seven day s. The wheel 0, which is graduated for the hours of the day, is fastened upon the hub 01. of the wheel M by the projection b, and rotates with the same. On. the same hub'is the wheel B, which is fastened the outer edge, leaving the depression d and the cam-projection e thereon; and the edge of O is similarly cut away, leaving the depression f and the cam-projection g thereon. When the two wheels B and G are fastened together by the thumbserew Q, side by side,,they form one wheel, and have a common depression, 71, which may be enlarged or diminished by rotating the wheel B'on the wheel A with the, thumb-screw, and setting the same, and a common cam or projection, i, which may be e11- larged or diminishedin the same manner. Pivoted near the lock is the two-armed lever, B, whereof one arm carries the roller S, and is lifted through the same by the cami, revolvin g under the same at said cams inclined plane k, and, at the same time, the other arm T of said lever lifts the dog-lever V, as shown by the dotted lines, Fig. 1, up behind the doorbolts W W W W into the position shown in Fig. 5, thereby lockingsaid bolts forward behind the jamb of the safe so the door cannot be opened. Said dog-lever V is pivoted at I. On the other hand, when the cam i isrotated entirely under the roller S, said roller is suffered to drop by gravity into the depression h at the inclined plane m, which allows the dog-lever V to fall from behind the safe-bolts and the safe to be opened. The seventh-day wheelA has on its edge a cam-projection, n, which rotates once while the depression h rotates seven times, as described, and is so arranged relatively to the said depression 71. that, on every seventh revolution thereof, it is brought under the roller S, and holds up the lever B while the depression h passes under it,

PATENT Orrrcn so that every seventh day the same prevents the safe from being unlocked.

From the description aforesaid, the mode of operation will be obvious. The clocks are set to true time by bringing thehounmark on the dial C under the roller S, which is readily done by turning the dial, as the wheels A, B, G, and M are freely turned in the direction of the an row on G, inasmuch as the ratchets behind H and I do not interfere with motion. in that direction, but take up, and, through the clocks force, proceed with, whatever advance of said wheels may be made. The lock is then set to lock up at any given hour by loosening the thumbscrew Q, and turning the inclined plane k of the wheel B to the mark of the required hour, and then fastening the wheels 13 and 0 together by setting the thumb-screw Q.

it it is desired to have the lock open any amount of time earlier than the set time, (nine oclock,) the wheel 0 must be turned, as described, until the time indicated under the roller shall be that amount fast of true time, the closing-mark being altered, if desired, to suit the case. If it is desired to open later,

- the clocks must be stopped until they are slow of time as much as it is desired the lock shall open later than the set time, correcting the closing-mark, if desired.

If the Wheels A, B, G, and M are turned, as described, until the cam part a of the wheel A shall be in position to come under the roller S, and keep the lock from opening on Sunday, it will continue to do so on Sunday each week if the clocks run on unchanged. In case that it shall be desired that the lock shall not open for a holiday or other day, the said Wheels may be rotated until said cam part 12 is in position to come under and hold up the lever L- on said day.

The lock is affixed to the side F of the safe, as described, to avoid derangement or stoppage of the clocks by concussion on the door.

It is evident that the dog-lever V and the lever B may be the same piece. The object in making the same in two parts is to save the weight of the part V, which depends upon the pivot I, from adding to the labor of the clocks.

What I claim as my invention, and for which I pray Letters Patent, is-

1. The combination, with one or more clockmovements, of one or more wheels, H I, one or more ratchets, K L, and a common wheel, M, arranged as described, for the purposes set forth.

2. The wheels B and O, with the depressions d and f and the projections e and 9, located relatively to each other, as described, to in crease and diminish the surface of a common cam, i, or depression h, by rotation on each other, for the purposes described.

3. The wheel A with a cam, n, adjusted, as described, to prevent the falling of the lever B and dog V, either periodically or at required times, as described.

SAMUEL ALLEN LITTLE.

Executed in presence of- J OSEPIH H. WILDER, G'Eo. \V. MIRroK. 

